Besides the obvious answer that theyâre different colours, whether or not you need to use red or blue ink will depend on the type and age of your machine.
Specialties: Western Provident Association, WPA is a not-for-profit private medical insurance company specialising in private health insurance and dental insurance policies that are tailored for individuals and companies. Offering the freedom toâ¦
For more than 60 years, Western has been supplying products for the control, storage and transmission of high-pressure gases to the industrial, medical and specialty gas markets. Western is dedicated to being the best provider of compressed gas systems and components. Gas Equipment.